Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
什么是触发器？
PostgreSQL 触发器是数据库的回调函数，它会在指定的数据库事件发生时自动执行/调用。
具体教程详见：https://mp.weixin.qq.com/s/O0ociKi4ABVpX5rxcw9TVA